<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	public function authenticate()
	{
		
		//在这个地方来校验用户名和密码的真实性
		//首先看看是否有此用户名存在
		//find() 如果没有查询出数据，则会返回null
		//findAll() 空数据会返回空数组
		
		$user_model = Manager::model()->find('user_name=:name', array(':name'=>$this->username));
		
		//如果用户名不存在
		if($user_model === null){
			$this -> errorCode = self::ERROR_USERNAME_INVALID;
			return false;
		}else if($user_model->pass_word !== $this -> password){
			//密码判断
			$this->errorCode=self::ERROR_PASSWORD_INVALID;
			return false;
		}else{
			$this->errorCode=self::ERROR_NONE;
			return true;
		}
		
		
		
// 		if(!isset($users[$this->username]))
// 			$this->errorCode=self::ERROR_USERNAME_INVALID;
// 		elseif($users[$this->username]!==$this->password)
// 			$this->errorCode=self::ERROR_PASSWORD_INVALID;
// 		else
// 			$this->errorCode=self::ERROR_NONE;
// 		return !$this->errorCode;
	}
}